The article seems to be lacking some context:
https://en.wikipedia.org/wiki/Iran_and_state-sponsored_terro...
https://en.wikipedia.org/wiki/Iran_and_state-sponsored_terro...
The second link is not relevant, the international community is confident Iran is sticking to the agreement, so pointing to a non-existent issue as some kind of a gotcha, especially as the biggest complainer about this in the region themselves have undeclared stockpiles, is not really relevant.
Spare us with the propaganda. The world has caught up and can see through it.